Even though there have been a variety of electrochemical sensors, it is of great importance to search for a nanomaterial with efficient active sites and explain its mechanism in the electrochemical detection of heavy metals. In the present research work, flower-like oxygen vacancy-rich zinc oxide (OV-ZnO) is prepared by processing flower-like ZnO (ZnO) with plasma. The presence of oxygen vacancies

LiNi0.8Co0.1Mn0.1O2 (NCM811) cathodes have attracted the attention of the automotive industry due to their higher capacity and operating voltage. Despite their promising electrochemical behavior, these materials do not have a stable cycling performance, as parasitic reactions take place when they come in contact with the electrolyte. Herein, amorphous Nb2O5 is applied as a multifunctional protective

Potassium ion batteries (KIBs) are emerging notably due to the reversible K+ intercalation into graphite. So far, optimization of graphite electrode formulation remains, however, to be investigated. This work thus proposes to optimize ionic (porosity) and electronic percolation networks as well as mechanical properties of graphite electrodes for KIBs. To do so, carbon black amount (CB) and electrode

Shiga toxin-producing E. coli (STEC) is a food-borne pathogen of great concern due to the severity of the disease it can cause. A key pathogenicity factor is the ability to produce Shiga T Toxin 1 and 2, which are encoded by genes stx. Herein we report the development of a highly sensitive, label-free, electrochemical DNA-based sensor for the detection of the stx1 gene using interdigitated gold microelectrodes

Lithium-ion batteries (LIBs) with high volume specific capacity have promising applications in small/microelectronics. However, the contradiction between Li+ diffusion kinetics and material compaction density severely restricts its development. The layered bismuth selenide (Bi2Se3) with high conductivity and compaction density is a candidate material for LIBs with high volume specific capacity. In

The use of non-metal ammonium ions (NH4+) as effective charge carriers in battery systems is receiving widespread attention because of their light weight and small hydration shells in water as well as abundancy of the elements. The research concerning NH4+ ion redox chemistry in batteries is still in its infancy, mainly because the large ionic radius of NH4+ would require a host material to have a

The feasible solution to overcome the mismatch between the world's energy demand and supply can be the development of appropriate charge-storing devices like batteries and supercapacitors. In the present work, an attempt has been made to design an efficient supercapacitor electrode material by employing the synergistic effects of Molybdenum disulfide (MoS2) and reduced graphene oxide (RGO). A time

Lithium rich layered oxides (LRLOs) are one of the best alternatives for the next generation positive electrodes materials for Li-ion batteries. However, LRLOs suffer a remarkable voltage decay upon cycling that prevents stable and prolonged electrochemical performances and contains large quantities of cobalt in the transition metal blend. Here, we demonstrate the performance in batteries of a series

Addition of trace lanthanum salt in acid solution was found to be enhanced inhibitory effect on hydrogen permeation to X70 pipeline steel. The hydrogen permeation curves were performed to show that the addition of La3+ inhibits hydrogen permeation by accelerating the recombination of the adsorbed hydrogen atoms and the desorption of hydrogen molecule, which decrease the subsurface hydrogen concentration

A better efficiency for the selective flotation of copper sulfides containing enargite (Cu3AsS4) can be achieved through potential control. It is proposed that oxidizing reagents as surface modifiers could selectively change the flotation behavior of the minerals involved in the concentration process. Hence, it is essential to evaluate the oxidation response of enargite produced after conditioning

Determining the chemical diffusion in active materials is crucial to the modeling and simulation of the chemo-mechanical interaction during electrochemical cycling of lithium-ion batteries, in which the diffusion coefficient of lithium plays an important role in describing the migration of lithium. Among the existing electrochemical measurement techniques, potentiostatic intermittent titration technique

In this study, we apply the superoxide-assisted electrochemical deposition method to obtain polyporphyrin films based on 2Н-5,10,15,20-tetrakis(3-aminophenyl)porphyrin from dimethylsulfoxide solutions. It is shown that changes in the potential scan rate affect the film formation efficiency and surface morphology of electrodeposited polyporphyrin films. Poly-2H-5,10,15,20-tetrakis(3-aminophenyl)porphyrin

Modification of carbon surfaces by electrografting is a relevant topic due to its potential applications in different fields of science, which has motivated the publication of many works focused on different methodologies to get covalently attached films or to study their properties. Diverse organic molecules have been found to be able to produce grafted films on carbon-based electrodes and their reduction

The models of non-aqueous lithium-oxygen (Li-O2) batteries with the flooded electrode (FE) and partially wetted electrode (PWE) are established based on TEGDME electrolyte, considering the movement of electrolyte interface caused by the evolution of solid-phase. The models are verified by comparing the discharge curves at different electrolyte contents. Then the influence of electrolyte filling modes

Gallium-based liquid metals are considered as potential anode materials for lithium-ion batteries owing to their self-healing, non-poisonous advantages, as well as high theoretical capacity. However, due to the alloying/dealloying reaction mechanism to store lithium, Gallium-based alloys face huge volume change resulted in poor cycle life. Furthermore, the poor wettability of liquid metals on many

To accurately predict the lifetime of commercial cells, multi-physics models can be used, however the accuracy of the model is heavily reliant upon the quality of the input thermodynamics and kinetic parameters. The thermal properties and the variability of the transport and thermodynamic properties with temperature and state-of-charge (SoC) in a high energy 21700 cylindrical cell were measured. The

A novel composites conductive fiber based on Poly(diallyldimethylammonium chloride) and multi-walled carbon nanotubes/Poly(3, 4-ethylenedioxythiophene)-Poly(styrenesulfonate) has been prepared using layer-by-layer assembly (LBL) technology. The characterization results showed the composites film was successful prepared on the cotton fiber and had flexibility, conductivity and washability. The fiber-based

The poor electronic conductivity of fluorinated graphite (CFx) is one of the key problems limiting its electrochemical performance. Herein, polydopamine−derived nitrogen−doped carbon coating is adapted to improve the electrochemical performance of CFx by modifying its electronic conductivity. The effects of dopamine hydrochloride/CFx ratio and the carbonization temperature on the electrochemical performance

Few researchers have studied high metal ions concentration electroless plating solutions since increasing metal ions concentration shortens the solution life considerably. Nevertheless, as the required thickness of the electroless plating film reduces gradually, the limited solution life will not be a large problem. There are no detailed studies on the influence of high copper concentration electroless

Here we report on a facile, rapid, selective, and stable electrochemical sensing platform for nicotinamide adenine dinucleotide (NADH) based on polythionine-methylene blue/electrochemically reduced graphene oxide modified glassy carbon electrode (PTH-MBDES-ERG/GCE). The ERG was directly formed on a glassy carbon electrode (ERG/GCE) through one-step electrochemical reduction of GO in PBS solution (10

Here it is reported the electrosorption of fluoride in the presence of competing anions of environmental relevance (chloride, nitrate, sulfate, phosphate and arsenate) by two activated carbon electrodes impregnated with La(III), La-0.5% and La-1.5% (w/w %). The electrosorption kinetics were evaluated using equimolar initial concentrations (0.263 mM of each studied anion) in both binary solutions (F−

Silicon (Si) is considered to be one of the most suitable anode materials for high energy density lithium-ion batteries due to its high theoretical specific capacity. However, the practical application of Si anode is limited by its huge volume change, leading to the rupture of electrode during cycling. In this study, a natural polymer of poly-glutamic acid (γ-PGA) is derived from nattomycin gum and

Conversion-type transition metal oxides (TMOs) anodes with fascinating high theoretical capacities are considered potential candidates for high-energy-density alkali-ion batteries. However, the tremendous advantages of conversion reaction are yet to be fully exploited due to sluggish reaction kinetics and unfavorable thermodynamics. This is especially in the case of non-layered TMOs, where high ion

Symmetrical solid oxide fuel cells (SSOFCs) with identical anode and cathode have many benefits compared with traditional SOFCs. However, it is still a challenge to find high performance electrode materials with excellent catalytic activity and preferable stability under both reducing and oxidizing atmosphere. Here, a novel Ba0.9La0.1Co0.7Fe0.2Nb0.1O3-δ (BLCFN) perovskite electrode has been developed

Abstract not available

For first time a 3D simulation for infiltrated electrodes taking into account the charge transfer resistance (CT) for computing the admittance is developed. By employing a three-dimensional voxelised resistor network, we study the electrode resistance as a function of electrode microstructure and material conductivities. The simulated electrodes consist of pores, metal and ion conductor material and